Effect of C3H6 on selective catalytic reduction of NOx by NH3 over a Cu/zeolite catalyst: A mechanistic study

被引:65
|
作者
Luo, Jin-Yong [1 ]
Oh, Harry [1 ]
Henry, Cary [2 ]
Epling, William [1 ]
机构
[1] Univ Waterloo, Dept Chem Engn, Waterloo, ON N2L 3G1, Canada
[2] Cummins Inc, Columbus, IN 47201 USA
关键词
Selective catalytic reduction; NOx control; Diesel emissions; Transient-response method; In situ DRIFTS; Catalyst poisoning; SITU FT-IR; COKE FORMATION; EXCESS OXYGEN; SCR; CHEMISTRY; PROPANE; PROPENE;
D O I
10.1016/j.apcatb.2012.04.038
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The effects of C3H6 on key SCR reactions over a model Cu/beta zeolite catalyst were characterized using step-response method reactor testing. Under standard SCR conditions, C3H6 clearly inhibited the reduction reaction at 200 degrees C and above. The inhibition was not caused by competitive adsorption between C3H6 and NH3, but by surface intermediate species formed during C3H6 oxidation, including acrolein-like and coke species as indicated by in situ DRIFTS. Similar to the standard SCR reaction, C3H6 also had a negative effect on the fast SCR reaction. Spaci-FTIR (spatially resolved capillary-inlet Fourier transform infrared spectroscopy) results indicated that NO2 was quickly reduced to NO by C3H6, leading to the occurrence of some standard SCR instead of purely fast SCR. However, C3H6 had a positive effect on NO2 SCR. The reduction of NO2 to NO by C3H6 resulted in the occurrence of the fast SCR reaction combined with NO2 SCR instead of pure NO2 SCR. The reaction pathway change also decreased N2O formation significantly. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码:296 / 305
页数:10
相关论文
共 50 条
  • [31] Investigation of selective catalytic reduction of NOX with NH3
    Qu, Hongxia
    Zhong, Qin
    Nanjing Li Gong Daxue Xuebao/Journal of Nanjing University of Science and Technology, 2002, 26 (01): : 68 - 71
  • [32] Promotion effect of alkaline leaching on the catalytic performance over Cu/Fe-SSZ-13 catalyst for selective catalytic reduction of NOx with NH3
    Wu, Ganxue
    Liu, Siyi
    Chen, Zhiqiang
    Yu, Qiyuan
    Chu, Yinghao
    Xiao, Hong
    Peng, Hong
    Fang, Dexin
    Deng, Shihuai
    Chen, Yaoqiang
    JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS, 2022, 134
  • [33] Phosphorus poisoning and regeneration of the Cu-LTA catalyst for the selective catalytic reduction of NOx with NH3
    Hu, Xueyang
    Lin, Jinhan
    Tan, Xuechao
    Li, Yingjie
    Liu, Xiaofeng
    Zhang, Yan
    Shan, Wenpo
    CATALYSIS SCIENCE & TECHNOLOGY, 2024, 14 (05) : 1293 - 1304
  • [34] Phosphorus poisoning and regeneration of the Cu-LTA catalyst for the selective catalytic reduction of NOx with NH3
    Hu, Xueyang
    Lin, Jinhan
    Tan, Xuechao
    Li, Yingjie
    Liu, Xiaofeng
    Zhang, Yan
    Shan, Wenpo
    Catalysis Science and Technology, 2024, 14 (05): : 1293 - 1304
  • [35] Research on selective catalytic reduction of NO with C3H6 over Cu/Al2O3
    Faculty of Environment Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
    不详
    Wuhan Ligong Daxue Xuebao, 2007, 3 (58-62):
  • [36] KINETICS OF THE SELECTIVE CATALYTIC REDUCTION OF NO BY NH3 OVER A COMMERCIAL CATALYST
    ROBINSON, WRAM
    VANOMMEN, JG
    WOLDHUIS, A
    ROSS, JRH
    STUDIES IN SURFACE SCIENCE AND CATALYSIS, 1993, 75 : 2673 - 2676
  • [37] NOx removal by selective catalytic reduction with NH3 over MOFs-derived MnTi catalyst
    Du, Rongting
    Du, Yali
    Liu, Xuezhen
    Fan, Zhaoyang
    Wu, Xu
    JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING, 2022, 10 (03):
  • [38] Selective catalytic reduction of NOx with NH3 over a novel Co-Ce-Ti catalyst
    Wang, Zhihua
    Lan, Jianmin
    Haneda, Masaaki
    Liu, Zhiming
    CATALYSIS TODAY, 2021, 376 (376) : 222 - 228
  • [39] Selective Catalytic Reduction of NOx with NH3 over Novel Fe-Ni-Ti Catalyst
    Liu, Zhiming
    Feng, Xu
    Zhou, Zizheng
    Xu, Qi
    INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2018, 57 (22) : 7458 - 7465
  • [40] Selective catalytic reduction of NOx with NH3 over a novel MOF- derived MnOx catalyst
    Chen, Ruiyang
    Fang, Xiaoyu
    Li, Zhenguo
    Liu, Zhiming
    APPLIED CATALYSIS A-GENERAL, 2022, 643